Device for controlling and regulating the thread tension in shuttles of embroidering-machines.



H. SAURER.

DEVICE FOR CONTROLLING ANDA REGULATING THE THREAD TENSION IN SHUTTLES 0F ENIBROIDERING MACHINES.

' APPLICATION FILED AUG.I|I9I1 l I WT/@I Patented Indy 23, 1918.

IIV II'IIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII .II I//M/ M IIHIIIIWIWWW" /M mr Nommverm H. SAUBER. DEVICE FOI?v CONTROLLING AND REGULAITING THE THREAD TENSION IN SHUTTLES 0F EMBHOIDERING MACHINES.

APPLICATION FILED AUG. l. I9I.

Pnted July 23, 1918;.

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H.SAURER. l DEVICE FOR CONTROLLING AND REGULAIING THE THREAD TENSION IN SNUTTLES 0F EIVIBIIOIDERING MACHINES.

v APPLICATION FILED ADG. I, |917. I A WHNHI mmm July 23, 1918.

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'llldl'llll SltdllFlS "F.Mlhlllll FFMFL IIDEVIGE FOR, CONTMOLLXNG AND REGULATNG THll THREAD TENSION IN SHUJLTLIES Uli LEMBROKDERINGdWAGHlMFiS. l

leraars.

Application iled August l., 191.7.

To all whom t may concern Be it known that I, HIPPOLYT SAUBER, a citizen of the Republic of Switzerland, residing at Arbon, Switzerland, have invented certain new and useful Improvements in Devices for Controlling and Regulating the rlhread Tension in Shuttles of Embroidering-Machines; and l hereby declare the ollowing to be a full, clear, and exact description of the invention, such as will `enable others skilled in the art to which it apper tains to make and use the same, reference being had to the accompanying drawings, and to letters or gures of reference marked thereon, which form a part oil this specication.

For the purpose of varying the thread tension in shuttles used in embroideringmachines it is necessary-as it is well known to those skilled in the art-to adjust the pivoted clip acting upon a plate spring. Such an adjustment of the clip has been carried out hitherto by hand, so that its was quite impossible togive to a thread the eX- act tension required and to adjust the thread tension of all shuttles used in one and the same machine in the same manner.

The object of this invention is to provide a device for ellecting the adjustment of the clip and thus the regulation of the thread tension in a mechanical manner and also automatically, so that vany desired thread tension may be given to each'single shuttle and an equal thread tension may be imparted to all shuttles of an embroidering machine.

"lo the attainment of these ends the tension of the thread, guided from the thread hole of the shuttle "to a device for drawing the thread out ot the shuttle, is transmitted, against the actionoit au adjustable counterforce, to a member, which, when it is moved out of its position oi rest correspondingto the normal tension of the thread by means of a power transmitting system, etl'ects a corresponding movement ol a member governing the movement of the pivoted spring tensioning clip, so that each deviation from the normal tension oi. the thread causes such a displacement of the clip, that the normal tension is restored.

This invention will now be more particu- .larly described. with reference to the a specicatiou o1 ltetters Patent..

Fatented iluily t3, Mild..

serial no. lasser.

companying drawings, which illustrate several constructional examples: Y

Figure l is a side view of a device which embodies the invention.

Fig. 2 is a vertical longitudinal section of this device.

Figs. 3 and d are horizontal sections on the lines lr-lli and B-B, respectively, of Fig. l. j i

Figs. 5 and 6 are vertical sections on the lines Q and D4D, respectively, of Fig. l.

Figs. 7, 8, 8a, 9, 10, ll, llEL and l2 show details ol this embodiment.

Fig. 13 shows a vertical longitudinal seetion of a second exempliiication of the invention in which the device for drawing the thread out of the shuttle is arranged between the latter and the device for con trolling and regulating the thread tension.

F ig. 14E is a section on the line EME of Fig. 13.

Fig. l5 is a sideview ol a third eXemplilication of the invention, in which the shut tle `is arranged between the device for drawing the thread out of the shuttle and the device for controlling and regulating the thread tension, and

Fig. 16 a section` on the line FMF of Fig. l5.

`Similar numerals relier to similar parts throughout the severalv views.

The shuttle -a-, the thread tension of which is to be regulated, is fixed in` a suitable manner in the casing l oi' the device. The thread cof the bobbin fitted in the shuttle -apasses through the thread hole and over a guide pulley 2 from which itis led to a device adapted to draw the thread out of the shuttle -`a-. This device comprises a. wheel or button 3 having a roughened outer surface around which is Vwound the end of said thread for the purpose of securing a drawing engagement. To a shaft 4t (Figs. 3 and 6) carryingwheel 3 are fined a cam disk 5 and a wheel 6. The

latter is `driven from a suitable source of power notjshown on the drawings by means ot a cord?. rlFhe guide wheel 2 1s loosely mounted on a horizontal arm 8 of a Jframe il (Fig. 5) adapted to pivot on adjustable screws l0 provided in the lateral Walls of casing l, The arm 8 entends through a, clot 11 (Eig. 5)' ofthe casingl. 12is-aneye provided'on the lower horizontal arm-of this frame 9. To this eye is hooked one end of a spring 13 the otherend `of-which-isfixedto the casing 1 by means of a hook let (Fig. 2).4 To.- theV frame 9 is-.tixeda second horizontal arm 15 provided witha.forked-end (Figs. 2, 3, 5), which is adapted to engage verticali'feedg'leven 15;v Theupper end of this lever 16 constitutes a pawl 1.7, which is adapted to cooperate withY tne teeth of feed lwheels 18 and 19.` The teeth of the latter are directed in opposite directions. The lowerpart of the feed'lever 16 is connectled by means of a pin joint to a. double armed lever 270 pivotall'y mounted'on ay shaft 21 (Fig. 6) supported in the casing 1. One arm of this lever 20. carriesia roller 22 cooperating withthe cam disk 5 (Fig. 2). This lever 20'has also an arm 23 connected to thecasing 1 by means of a spring 2l, so

that-the, roller 22gisalways forced to rest on* the camdisk 5, while the feed lever 16 is 4normally kept in its position of rest, c., in a position where. it is prevented'from Y acting upon the. feed wheels 18,19.

On theshafts. 25, 26, carrying these feed 'wheels are loosely mounted the toothed Wheels 27,' 28 (Fig. 3) rigidly connected to said wheels 18 and 19 and adapted to mesh with teeth 2.9 ofa rack 31 sliding in bearings 30; The rack 31 is also provided with a second series of teeth 32, meshing with a .toothed Lsector 33, fixed to a vertical shaft bobbin -ccontained in the shuttle apasses 1n the yusual manner beneath the plate' spring fw acted upon by the movable clip v-(Z.-- and then through the shuttle hole -ZJ- and from ,here it is fed, as already stated, over the roller 2 and the wheel 3 with which it YmayV be engaged by winding'several times aroundthe roughened surface. .Upon the .imparting of rotation to the wheel lGby'means of the driving cord 7 ,in the direction of the arrow #H- shown Vin. Fi'gs'.- 1 and Q2' rotation is also imparted tothe shaft 4 and the wheel 3 by means of a device described more fully later on. The

'thread is then drawnv from the shuttle hole' ,-6,- andfwound upon the wheel 3. The tension of the thread -chas the tendency to move theguidewheel 2 together with the arm 8 movable. in the slot 11 and"th`e frame 9toward the wheel 3. The

`spring'13, however, tends to move the upper end of the frame 9 togetherwith the arm 8V and the guide wheel 2 away from the wheel 3, and to prevent movement toward wheel 3. Upon the ratio of these two forces exerted by the thread -cand the spring 13 depends now the manner o1 operation ,of the device. )Vhen these two forcer are balanced, c., when the thread tension is equalto the tension of the adjustable spring 13, which corresponds to the normal tension of the thread, the forked arm 15 of the frame 9 keeps the feed lever 1G in its neutralv position, so that its end 1T is prevented from acting. upon the Lteed wheels` 18, 19. In spite ofthe fact that during the rotation ofth'e wheel (i the cam disk 5 lixed to the shaft l imparts to the lever 2() a rocking movement against the action of its` spring v24, so that the feed lever 1Gy is reciprocated in a vertical direction, the latter movement is thusprevented from exerting` anyiniiuence uponany part of the power transmitting mechanism, and the shaft -lis not influenced in any way. The position ofthe pi-voted'clip (lis not changed. Thetension of the thread -c--, which had a normal vvalue when the device started to work, remains therefore also unchanged.

As soonas the tension of the thread -cis, however, greater or smaller than the normal tension (towhich corresponds also the tension exerted by the spring 13), the feed lever 1Gismoved in such a manner by means of the-forked end of the lever 15 acting upon frame 9, that it is caused to engage one ot' the feedwheels 18, 19. When the tension of the-thread is too great said feed. lever 1G. 17 acts upon the feed wheel 19, and when the thread tension is too small it acts upon the feed wheel 18.

In therst instance each rocking movement about the axis 21 imparted to the lever 20 by means of cam disk 5 and roller 22 causes an upward movement of the lever 1G, 17, so that a feed movement corresponding to the pitch of wheel 19 is imparted to the latter in the direction of the arrow shown in Fig. 2. This causes the toothed rack 31 to move away from the cam dish 5, so that a partial rotation in a counterclockwise direction is iu'lparted to the, seetor 33and shaft 3l (Figs, and Ll). Owing to this, the clip flis turned in such a marmer about its axis -fl-, that the tension of the thread cidecreases. This movement of the Clip 0L- and the decrease in the thread tension continue until the feed lever 16, 17 disengages the feed wheel 1S), which occurs at the moment at which the thread tension is equal to the tension of the spring` 13, e., equal to the normal tension.

When, on the other hand, the thread teasion is at t-he beginning` of the operation smaller than the tension of the sprintf 13, the feed lever 1G, 17 is caused to engage tht Slt) lll() lili,

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Leraars th Vfeed wheel 18, so that the latter' is rotated in the direction of the arrow shown in Fig. 2.

Owing to this, the toothed rack 31 provided with teeth 32 is moved toward disk 5, so that the toothed sector 33 and the shaft34 are moved in a clockwise direction (Fi gs. 3 and 4). rllhe result of this is a movement oit the clip -CZ- about its axis --(Z- having the ellect to increase the tension oil? the thread. This action continues until the contimially increasing thread tension is equal to the tension of the spring 13, c., lo the normal tension. As soon as this is the case the leed lever 16, 17 is caused to disengage the feed wheel 18, so that the shaft 34 is stopped and no further adjustment of the clip clis ett'ected. As the tension of the spring 13 can be adjusted, any desired normal tension may loe given to the thread drawn out of the shuttle -a-. ln order that the tension of the spring 13 may he adjusted in. a more eXact manner l give to the hook 14 a tl-shape and l provide on one of its ends a graduated scale 14". 'lhe other end of this hook 14 is screw threaded and guided in an adjusting nut 14', so that upon rotation of the latter any desired tension may he given to the spring 13. Scale 14" indicates the tension given to the spring 13. For the purpose of j )reventing an accidental rotation of the feed wheels 13, 19 and keeping them in a yielding manner in their momentary position, l pro vide said wheels witl'i brake-springs 13', 19. rlhe shaft 34 is supported in a yielding manner by means of a helical spring 34 for the purpose of facilitating the insertion of the lingers 35 into the shuttle -a--. '.llhe small hand wheel 36 xed to the shaft 34 may he used to return the shaft 34, the toothed sector 33 and the shaft 31 by hand into the starting position.` f l As already stated, the whole device is driven from the wheel 6. lnthe embodiment shown this wheel 6 is loose on shaft 4 and it may he clutched to the latter by means of any suitable device. rlhe clutch device shown by way of example comprisesa pawl carrier 37 rigidly connected to the shaft 4 and provided with a pivoted pawl 33.` The one `end 33` of the pawl 33, which has the shape of a double armed lever, as a clutchftooth and cooperates with lrecesses 39 `oit a :.clutchj dislr 40, 'whichis rigidly; connestedr to the driving wheel G` and` also 5.551

loosely mounted on the shaft 4. `'llhe other end 33 otthepawl acts as a stop and cos acts with the upper arm 4.20ct a clutch lever 44 pivotedat 43 to the casing 1 and acted "upon by a pre` surefspring 45 which presseI 1 the `arm 42 into the path oli' the end 3,3 oit the lever 33. rlhe pawl 33 isacted upon by a spring 41 which tends to cause the tooth 38 to mesh with the recesses 39 of the dish 40. The spring 45 is stronger than the spring 41, so that the pawl 33 is normally ti ons 66;

prevented from coming into engagement with the disk 40, the driving wheel 6 being in this case not coupled to the shaft 4. When it is desired to start the device the clutch lever 44 is pressed down by hand till the arm 4-2 releases the end 33 ot pawl 33, whereupon the spring 41 causes the end 33 o1 the pawl 33 to engage one oil: the rece, 39, so that the pawl. carrier 37 and the shalt 4 are cbnpled to the driving wheel (l. llpon. a releasing of the clutch lever 44 the stop 33 strikes, after a complete revolution olf the pawl carrier 37, against the arm 4Q and the device is uncoupled. lf such an uncoupling is not desired, the lever 44- has only to loe pressed constantly down. lis a rule, however, the thread tension can he regulated during a single revolution of the shalt 4.

ln carrying out the invention as illus trated in 13 and 14 the device for drawing the thread out oit the shuttle -u is not ar ranged behind Athe latter, but bct'ween the tension regulating devices and the shuttle -a-. ln this embodiment the device l'or drawing the thread out of the shut 51 mounted on pins lined on the casing 1. rlhis device comprises further a roller 52 mounted on a lever 5,3. rlhe lever 53 is adapted to pivot about a fixed axis 54 and it carries at its other end a roller 55 engaging a cam groove 56 of a disk 5'? lined to the shaft 4. lt will be seen that upon a rotation of the shaft 4 a rocking movement is imparted to the lever 53, which during the downward movement of its` lett hand end draws thread out oil the shuttle a. For the rest the construction and manner of operation of this embodiment correspond to the construction and working or' tliewlirst exemplilication.

Y ln the third embodiment of the invention,

`illustrated .in Figs. 15` and 16, the shuttle -uhas a reciprocating movement, it being arranged, to speak, between the device for controlling the thread tension and the device l'or drawing the thread out of the shuttle -c-. This last mentioned device consists principally of a movable plate 60 guided by means ot two pins 61 fixed in the casing 1 and projecting through a longitudinal slot 62 oi this plate G0. rlhe latter' is `also ijn'ovided with. a pin 63 engaging a groove 34 oi a cam dish 65 lined to the shaittfl.` "llhe shuttle ---e-- may he secured tothe plate G0 hy moans cl3' three projec- 'lhe toothed. wheels 27 and rigidly connected to the :feed wheels 13 and 19,` respectively, are adapted tomesh with a toothed Wheel 67 fixed on a shaft h3, which' carries also a skew gear G9. 'llhis slrew gear G9 meshes with a skew gear 70 lined to a shaft 712L on which is .keyed slidably a bevel wheel f`71, carried by an arm of the plate 30 and adapted to mesh with a hevel wheel 72` iiXed to' the shaft Slwhich is providedon itslower end `Vwith the' two fingers 35l for adrotation of the shaft 3l and theriefore an adjustment of the clip -cZ The hereinbefore described devices for controlling and regulating'the thread tension may be used in connection with any kind of shuttles for embroidering-machines provided with a transverse clip for regulating the thread tension. In order to' attain, however, a proper working it is preferred to provide the shuttles with a clip having a special shape (Figs. 8 and 10). The clip -flwhich is pivoted in the usual manner onV a pin -Z- is provided with a prolongation -g-. The latter is engaged in such a manner by the lingers S5 (Fig. 7) of the shaft 34, that the axis of the shaft 34 is in line withv the axis of rotation -dof the clipv CZ- According to the construction shown in Fig. 10 the prolongation gof the clip CZ-f is provided with a round hole In this case the shaft Sil is notprovided with two fingers or claws 35l but with a round eccentric linger 35 (seeFig. 11, showing a bottom view, and Fig. 12) adapted to engage the hole -tof the prolongation -gof the clip cl- Also in'this case the axis of the shaft 34 coincides with the'aXis 0f rotation -fof the clip -d-- 'Instead of havingssueh a pinthe shaft 34: may also be provided with a hole 34' adapted to be engaged by a pin 35 (Fig. llalon the prolongation -gof theclip -cZ-.

What I claim now as my inventionl is:

l. In a device of the character described, inA combination, Ameans for securing the shuttle in a determinate position, a device for drawing the thread out of the shuttle, a movable member, adjustable means adapted to exert a variable tensionupon this member to which is also transmitted the tension of the thread drawn out of the shuttle, a second movable member adapted to control the position of the clip acting Aupon the shuttle spring beneath which vpasses the thread drawn out of the shuttle and motion transmitting means adapted to impart a movement to this last mentioned inovableinem- Y ber for'the purpose of adjusting the position i of the'shuttle clip wh'ensaid first mentioned n member is ,moved out of its position of rest corresponding to the normal'tension of the thread,A so that each deviation from the normalV tension of the thread causes an adjustment of the shuttle clip.Y

2. In a device of the character described, in combination, means for securing the shuttle in a determinatelposition, `adr-iving shaft, a device operatively connected to this shaft for drawing the thread out of the shuttle, a roller, a pivoted member carrying this roller over which is fed said thread drawn out of the shuttle, a spring acting upon said pivoted member, the tension of the spring acting in the opposite sense upon this member as the' tln'ea'd'tcnsion, means for adjusting the tension ol' said spring, a second movable member adapted to control the position ofthe clip acting upon. the shuttle spring beneath which passesv the thread drawn out of the shuttle and motion transmitting` means imparting a movement to the movable member causing an adjustment of the shuttle clip upon al movement of said pivoted member outof its position of rest corresponding to the normal tension of the thread, each deviation from the normal tension' of the thread'causing thereby such an adjustment of the shuttle clip, that the normal tension is restored in the thread drawn out of the shuttle. y

3. In a device of the character described, in combination, means for securing the shuttle in a determinate position, a driving shaft, a roller provided with a roughened surface ixedto this shaft and adapted to draw the thread out Vof the shuttle, a frame adapted to oscillate about a horizontal axis, a roller carried by this frame, the thread drawn out of the shuttle being fed over this roller, a spring connected to the lower end of this'frame, means for adjusting the tension of the spring, the tension of the latter acting in the opposite sense upon this frame as the tension of the thread, so that vthe momentary position of the frame is determined by the ratio between the'tensions of the spring and the thread, a movable member adapted to control the position of the clip acting upon the shuttle spring beneath which passes the thread drawn out ofthe shuttle and motion transmittingrmeans imparting a movement to the movable member causing an adjustment of the shuttle clip upon a movement of said frame out of its position of rest, which corresponds tothe normal tension of the thread.

4. In a device of the character described, in combination, means for securing the shuttle in a determinate position, a driving shaft,

a roller provided with a roughened surface fixedto this shaft and adapted to draw the thread out of the shuttle, a frame adapted to oscillate about a horizont-al axis, a roller carried by this frame, the thread drawn out of the shuttle being fed over this roller, a spring connected to 'thelower end of this frame, means `for adjusting the tension of this spring, the tension of the latter acting in the opposite sense upon this frame as the tension of the thread, so that the momentary position of the frame is determined by the ratio between the tensions of the Leraars by this arm, means for imparting to this lever an upward and downward movement, two feed wheels, the feed lever being, ac cording to the position of the frame, either in a p r sition of rest or adapted to engage one of these two feed wheels, a movable `shaft adaptedto control the position of the clip acting upon the shuttle spring beneath which passes the thread drawn out of the shuttle and means adapted totransmit the movement of said feed wheels to this movable shaft.

5. ln a device of the character described, in combination, means for securing the shuttlc in a determinate position, a driving shaft, a roller provided with a roughened surface fixed to this shaft and adapted to draw the thread out of the shuttle, a frame adapted to oscillate about a horizontal axis, a roller carried by this frame, the thread drawn out of the shuttle being fed over this roller, a

sliring connected to the lower end of this frame, means for adjusting the tension of this spring, the lmision of the latter acting in the opposite sense upon this "rame as the ltension of the thread, so that the momen- "tary position of the' frame is determined by the ratio between the tensions of the spring and the thread, a forked arm provided on said frame, a feed lever engaged by this arm, a pivoted lever connected at one end to said feed lever and carrying at its other end a roller, a cam disk fixed to said driving shaft and adapted to act upon this roller, two feed wheels, the feed lever be ing, according to the position of the frame, either in a position of rest or adapted to engage one of these two feed wheels, a movable shaft adapted to control the position of the clip acting upon the shuttle spring beneath which passes the thread drawn ont of the shuttle and means adapted to transmit the movement of said feed wheels to this` movable shaft. i i

(5. ln a device of the character described, in combination,means for securing the shuttlc in a determinate position, a driving shaft, a roller `iixed to this shaft and adapted to draw the thread out of the shuttle, a frame adapted to oscillate about a horizontal aXis, a roller carried by lthis frame, the thread drawn out of the shuttle being fed over this roller, a spring connected to the lower end of this frame, means for adjusting the tension of this spring, the tension of the latter acting in the opposite sense upon this frame as the tension ofthe thread, so that the momentary position of the frame is determined by the ratio between the tensions of the spring and the thread, a forked arm provided on said frame, a feed lever engaged by this arm, means for imparting to this lever an upward and downward movement, two feed wheels, the feed lever being, according to the position of the fra-me, either in a position of rest or adapted to engage one of these two feed wheels, two toothed wheels,`each of the latter being rigidly connected to one of saidfeed wheels, a toothed rack adapted to coperate with said toothed wheels, a shaft, a toothed sector on this shaft adapted to niesh with said rack and means on this shaft adapted to control the position of the clip acting upon the shuttle spring beneath which passes the thread drawn out of the shuttle.

7. ln adevice of the character described,

` in combination, means for securing the shuttle `in a determinate position, a driving shaft, a wheel loose on this shaft, a source of power driving' said wheel, means adapted to cou ple said wheel to the driving shaft, a device operatively connected to this shaft for drawing the thread out of the shuttle, a roller, a pivoted member carrying this roller over which is fed said thread drawn out of the shuttle, a spring acting upon said pivoted member, the tension of the spring acting in the opposite sense upon this member as the thread tension, means for adjusting the tension of said spring, a second movable member adapted to control the position of the clip acting upon the shuttle spring beneath which passes the thread drawn out of the shuttle and motion transmitting means i1nparting a movement to the movable me1nber causing' an adjustment of the shuttle clip upon a movement of said pivoted mem ber out of its position of rest corresponding to the normal tension of the thread, each deviation from the normal tension of the thread causing thereby such an adjustment of the shuttle clip, that the normal tension is restored in the thread drawn out of the shuttle.

8. In a device of the character described,

in combination, means for securing the shuttle in a determinate position, a driving shaft, a source of power, a wheel loose on this shaft `and drivenlby this source of power, a cousense upon this member as the thread teni sion, means for adjusting the tension of said spring, a second movable member adapted to control the position of the clip acting upon the shuttle spring beneath which passes the thread drawn out of the shuttle and motion transmitting means imparting a movement to the movable member causing lanadju stment of the shuttle clip upon a movement of s aidpivoted member out of its position of rest corresponding tothe normal -Itension' yofthe thread, each deviation from tle in a determinate position,l a driving shaft,

a device operatively connectedjto this shaft for dravvingthe thread out of the shuttle, a

lroller, ,a. pivotedmember carrying4 this roller over vvhich'is fed saidthread drawn out of the,sh uttle, a springacting upon said pivotedmember, kthetension of. the spring acting inthe opposite sense upon this member as the thread tension, means for adjusting thetension of spring, a i movable shaft, fingers omthe loiverv end of this shaft adaptedto lengage api-elongation,otthe clip actinglupon the shuttle Vspring.beneath which passes thefthread dravvn out of the shuttle and .motion transmitting means imparting a movement to lth'eshaaat provided with said ingerscau'sing an adjustment of zthe shuttle ,clip upon Ia movement of said pivoted member L out of iits position of rest corresponding tothenormal tension ofthe thread, each :deviation tfrom ,the `normal `tension ol the .threadcausing thereby ksuch an adjustment,y ofthe shuttle clip, that the normal tension is restored in ,the thread drawn out of the shuttle.l

1 0. Ina ,machine ,for adjusting the pressure of the I,thread ,tension springs of shuttles, `in combination, lmeans to support a shuttle, l means to .draw :out thread from the shuttle, means external tothe shuttle to vary the pressure on the thread tension spring of the shuttle, and ,deVCes also external to the shuttle and C QlltlOlledvby/the tension of the Vthread to operate said last named means.

1 1. In adeviceoi1 thecharacterdescribed, incombination, means to `support a shuttle, means to `draw .out :thread lfrom the shuttle, means to `vary the pressure on the .thread tension spring of the shuttle, transmission devices to -operate said last ,named means in Onedirecti'on ortherother, yto increase or decrease the pressure on the thread tension spring, and including oppositely acting gears, acontinuously operating actuator normally out offo'perative relation `with both of Said gears, ,andjmeans controlled by the tensiongof .the thread to movesaid actuator into operativerelation `Withone or-the other of said gears.

12. ln a device of thecharacter described,

in combination,lmeansto support `a shuttle, means todraW out thread from the shuttle, means to vary the pressure on the thread tension spring of the shuttle, transmission devices to operate said last named means in one direction or the other, to increase or decrease the pressure on the thread tension spring, and including oppositely acting gears, a continuously opera ting actuator normally out of operative relation with both ot said gears, a pivoted trameengaging said actuator and adapted to movethe same into operative relationwvith one or the other of said gears, said frame being subjectto Ithe tensionof the thread in one direction, and a spring connected to the frame to move the same in opposition to the tension of the thread.

13. In adevice of the character described, in combination, means to support a shuttle, means to draw out thread fromthe shuttle, a movable member subject to movement in one directionby the tension oit' thethread, means tending` toanove said member in the opposite direction, means to vary the pressure on the thread tension spring of the shuttle, and transmission devices controlled -by the position of said movable member to operate said last named means in one direc-tion or the other.

1l. In a device of the character described, in combination, means to support a shuttle, means to drawout thread from the shuttle, a movablemember subject to movementinone directionby the tension of the thread, means tending to move said member in the opposite direction, means to `vary the pressure on the thread tension spring of the shuttle, transmission devices to operate said last named means in one direction or the other and includingoppositely acting gears, and an actuator normally out of operation With both ot' said gears and adapted to be moved by said movable member into operative relation Withoneor-the other of said gears.

15. In a device of the character described, in combination, means tolsupport a shuttle, means to draw out thread :from .the shuttle l'iavinga` guide Wheel about which the thread passes, a spring applied-to the movable member to move the same in opposition to the tension 4of the thread, means to vary the HIPPOLYT SAUBER.

Genies of this patent may be obtained for Ifive cents each, byaddressing the Commissioner of Patents, Washington, 1110? 

